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相关概念视频

Short-distance Transport of Resources02:12

Short-distance Transport of Resources

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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field...
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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
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Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
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Quasi-light Storage for Optical Data Packets
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节能空中STAR-RIS辅助计算卸载和内容缓存用于无线传感器网络.

Xiaoping Yang1, Quanzeng Wang1, Bin Yang1

  • 1College of Computer Science, Beijing University of Technology, Beijing 100124, China.

Sensors (Basel, Switzerland)
|January 25, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了基于无人机 (UAV) 的无线传感器网络 (WSN) 的节能框架,这些无线传感器网络使用可重新配置的智能表面. 该方法优化了计算卸载和内容缓存,大大降低了系统能耗.

关键词:
计算 卸载 卸载 计算内容缓存 内容缓存同时发射和反射可重新配置的智能表面.无人驾驶飞行器是一种无人驾驶飞行器.无线传感器网络是无线传感器网络.

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科学领域:

  • 无线通信无线通信
  • 网络工程 网络工程
  • 人工智能的人工智能

背景情况:

  • 基于无人机的无线传感器网络 (WSN) 为地面传感器提供了移动性和视线连接.
  • 无人机WSN中的移动边缘计算 (MEC) 解决了传统基站的传输和覆盖范围的限制.
  • 同时传输和反射可重新配置的智能表面 (STAR-RISs) 增强了传播,但通常是固定的或未充分利用的.

研究的目的:

  • 为基于无人机的WSN提出一个节能框架,将STAR-RIS集成到计算卸载和内容缓存中.
  • 为了解决固定STAR-RIS位置和未充分利用的无人机计算/缓存能力的局限性.
  • 通过联合优化,最大限度地降低整体系统能耗.

主要方法:

  • 制定一个能源消耗最小化问题.
  • 将其分解为子问题:内容缓存,计算卸载,无人机悬浮和STAR-RIS资源分配.
  • 应用深度强化学习 (DRL) - 连续凸近似 (SCA) 组合算法,以获得接近最佳的解决方案.

主要成果:

  • 拟议的框架有效地优化了基于无人机的WSN中的资源利用.
  • 显示了整体系统能耗的显著减少.
  • 数值结果验证了DRL-SCA算法的效率.

结论:

  • 空中STAR-RIS辅助框架为无人机WSN提供了灵活和高效的解决方案.
  • 缓存,卸载,定位和光束成形的联合优化对于能源效率至关重要.
  • DRL-SCA方法为解决这个领域的复杂优化问题提供了一个低复杂度的方法.